Rotary disk sharpener



f Aug. 28, 19t-'Alfl w. A. FRusHl-:R

ROTARY DISK 'SHARPENER sheets-sheet 1 Flved'Feb. i4, 195o Wi/ liay A. Frusher INVEN TOR.

Aug. 28, 1951 W. A. FRUSHER- ROTARY DISK SHARPENER 2 Sheets-sheet 2 Filed Feb. 14, 1950 Wil/iam A. Frusher *INVENTO BAY WWW/5%@ Patented Aug. 28, 1951 UNITE-D STATES PATENT OFFICE 2,565,916 normar DISK snenrnnna 'weitem arrushi, Ness city, Kans. Application February 14, -1-950, Serial No. 144,178

(cl. '5i-24s) 3 Claims.

This invention comprises novela-nduseful-im*- provements in a rotary disk Sharpener andmore specifically pertains to an improved sharpening attachment which be readily applied to the fra-me of a rotary disk cultivator for sharpen-ing the edges of the rotary vdisks during operation of the implement. l

The primary object of this invention is to prov ide an improved attachment which maybe'readily Yapplied to all conventional types of rotary disk cldtivatorsfor-sharpening the disks thereof.

AYA- further object of the invention is to provide an attachment in conformity with the foregoing object wherein theA Sharpener-may be adjusted to impart predetermined beveled edges `at various selected angles with respect to the axis of rotation of the disks.

Still `another important object of the invention 'is to provide an improved sharpening attachment for rotary disks of disk cultivatcrs which may be readily adjusted to accommodate different sizes of disks; wherein bevels may befabraded on the edges of disks at predetermined angles with respect to the axis of rotation of the same; and wherein the abrading element of the Sharpener may be applied against the beveled vedge of a disk with a predetermined and easily adjusted resilientpressure.

.Still another important object' of the invention is to provide an improved sharpening attachment in conformity with the foregoing objects wherein the rotation Yof the disks-of thedisk lcultivator during normal operation or use of the-same may be relied -upon to impart rotation to an abrasive wheel carried bythe Sharpener vand for eecting an abrading action uniformly about the Vbeveled edge of adisk.

These, together with various ancillary features and objects of the invention, which will later be'- come apparent as the following description p roceeds, are attained by the present invention, a preferred embodiment of which has been illustratedby way of example'only in the aiicompanying drawings, wherein:

Figure 1 is a fragmentary top plan view showing a portion of a rotary `disk cultivator having the improved sharpening attachment forming the subject -of this invention applied thereto;

Fi`g'1'ire2 is a vertical transverse-sectional view taken Vsubstantially upon the plane indicated by the'se'ctin line 2 2 of Figure 1 and-illustrating thernann'er in which the Sharpener is applied .to a `disk cultivator frame for sharpening the. beveld edges of a rotary disk of the-same;

2- Figure 3 is a-fragmentary rear elevational view or the embodiment of Figure 1;

Figure Li is an end elevational View showing the abrasive Wheel and its support which forms an element of this invention;

Figure 5 is a perspective view show-ing a clamping element forming a part of the invention;

Figure 6 is a perspective View of another clampL ing element by means of which the abrasive wheel support is secured `to amounting arm forming a part of the invention;

Figure 7V is a fragmentary perspective vieut shot-Jing themannerin which the supporting arm is pivotally vand adjustablysecured to a standard forming a part of the invention; and

Figure S yis a perspective view of an adjustable brace eienient forminga part of the invention.

Referring now `more specically to the accompanying drawings, wherein Alike numerals clesigll nate similar parts throughout lthe various View it will be seen that numeral AI e indicates generally a portion of the frame of anfagricultural implement which in accordance with Y'conventional practice has journaled therebeneath lan axle l2 provided with a pluralityof cultivating disks i4, all of va conventional and known design. As is well understood by 'those skilled in the art, each of the disks I4 is provided with a beveled rim I6 cons 'tuting a knife edge which is employed to cultivate the ground as the implement 'is dragge thereover byvany suitable `towing means such as a tractor or the like. -Since'durirry usage the bevel'ed edges iof the'disks h1 customarily become dull by virtue of their'ngag'einent with the soil, 'rocks orthe like, `it-is`necessary lat more or less frequent intervals to `sharpen the disks by grinding or abrading the beveled edges it to again restore them to a circular knife edge.

-The'present attachmentwhich forms the subject of this inventionftherefore, aims to provide asharpening means which maybe easily mountedfupon the lframework il! or removed therefrom, and which maybe-readily'adjusted t utilize the rotation of the'dislis during normal operation of thecultivatorto'efect the desired abr'adihg action upon the bevelededges' ltfor restoring'their sharpness.

For `this'purpos'athere is Sprovided amounting means ltoadjustably attach the sharpening device'to-.the-fra'me il). This mountingrneans includes a clamping-bracket I8, vwhich 'as' lshown in Figures 2 andi'cnsists of perpendicularly disposed legs 253 'and 22, the former being "provided with la laterally 'extending `internally threaded boss-24 for-the reception of afset screw rthe `like 25. The leg 22, as shown best in Figure 5, is provided with a plurality of apertures or bores 28 for selectively receiving a vertical standard 3l) therein, the standard being retained as by set screws 32 disposed in suitable threaded apertures 34 in the side of the leg 22 and intersecting the bores 2B.

It will now be seen by reference to Figure 2 that the leg l2i) of the mounting bracket I8 slidably engages the vertically upstanding flange 34 of the transverse angle iron member 3E which constitutes a part of the frame I8.

It is believed apparent that by loosening the set screw 28, the bracket IS and the standard 38 carried thereby may be adjusted longitudinally of the beam 355, and by tightening the set screw 28, the standard 3G may be clamped against the opposite side of the flange Sil from the bracket leg 28, thereby securely locking the standard in adjusted position upon the angle iron member 36.

Slidably carried by the standard (i9, and Vertically adjusted thereon are a mounting means for the sharpening element and an abutment means .for yieldingly urging the abrasive element against the bevel I of a disk I4. rlhis mounting means, as shown best in Figures 2 and 7, consists of a sleeve or collar member 38, which loosely embraces the standard 38 and is vertically slidable thereon, it being locked in vertically adjusted position as by a set screw 4e, this sleeve being pivotally secured as by a set screw or bolt 42, to the apertured end of a supporting arm 44. The arm 44 is thus pivoted for vertical move ment, and likewise is adjustably vertically slidable upon the support standard A xed abutment 46 in the form of a laterally extending plate is provided with a tubular bos's or sleeve 48 which slidably embraces the standard 38, and is secured at vertically adjusted position thereon as by a set screw 5B. The outer end of this abutment arm 4% is apertured and receives the upper extremity of a stem 52 whose lower end is provided with a screw-threaded engagement with a nut a compression spring 5b being retained upon the stem between the lower surface of the abutment plate 4S and the nut 54, to thereby urge the latter and the stem into abutting relation with the upper surface of the pivoted support arm 44. A suitable retaining member 58 is provided upon the upper extremity of the stem 52 to prevent the latter from being withdrawn downwardly through the aperture in the abutment arm 46. IThus, the spring 5S through the nut 54 on the end of the stem 52 serves to yieldingly urge the supporting arm 44 in downward pivoted position upon itsVv pivot pin Adjustably mounted upon the end of the support arm 44 is the sharpening element forming an essential feature of this invention. A supporting base in the form of a flat plate or the like 60 of any suitable material, size and shape, has secured to its under surface as by means of a screw-threaded stem 62, see Figure 6, and a locking nut 64, a depending mounting bracket 6B having an aperture E8 therein and a set screw 18 extending into this aperture. The aperture 68 is adapted to receive the extremity of the support arm 44, whereby the plate B8 may be mounted upon the arm in an angularly adjusted position and locked thereon as by means of the set screw 18. Secured to the upper surface of the opposite ends of the plate as by fastening bolts 12, are a pair of journal bearings 14, see Figure 4, in which is journaled an axle 'I8 which is thus rotatably received in the journal 14 and is retained therein as by conventional fastening collars 18. The extremity of the axle 'I6 overhangs the end of the base plate 60 and is rigidly secured to an abrasive wheel of any desired character.

The arrangement is such that by properly positioning the mounting bracket I8 upon the angle iron beam member 36 the abrasive wheel B8 will be disposed so as to engage one of the beveled edges I6 of a disk I4. When so engaged, the resilient means 56 will yieldingly urge the abrasive wheel against the disk. The axes oi rotation of the disk I4 and the abrasive wheel 8G is such that a skew action is effected, whereby the frictional engagement of the disk and wheel will cause rotation of the wheel as the disks I4 and their axles I2 are rotated during operation of the cultivating implement. However, this rotation of the wheels 80 results in a scraping or abrasive action of the wheels upon the disk bevel I5 thereby uniformly sharpening these beveled edges during rotation of the disks.

In order to render the device more steady in its operation, a brace means is provided to render the position of the wheel more rigid with respect to the position of the disks i4. This brace means may conveniently comprise a mounting clamp 82, which may be of the same identical construction described with respect to the mounting bracket I8, and which vis likewise provided with a vertically extending standard 84, see Figure 3. A sleeve 86 is slidably received upon the standard 84, being adjustably retained thereon as by a set screw 88. This sleeve is pro-v vided with a pivot pin 98, which extends through an aperture S2 in one terminal 94 of an adjustable brace.

As shown best in Figure 8, this brace comprises a pair of slidably and longitudinally extensible straps 86 and 98 having a plurality of apertures for selective engagement by wing bolts or the like IIBG. Thus, the overall length of the straps and 98 may be varied as desired. At its other extremity the strap 98 is provided with an aperture |02 which is pivotally connected as at |84, see Figure 3, with a fastening sleeve IUE which is adjustably secured as by a set screw iB to the supporting arm 44.

It will thus be seen that the brace is adjustable so as to render the vertically pivoting support arm 44 more rigid against lateral displacement and thus to more securely retain the abrasive wheel 80 in proper engagement upon the beveled edge of the rotary disk.

From the foregoing, the construction and operation of the device together with its many ad vantages will be readily understood and further explanation is believed to be unnecessary. However, since numerous modiications and changes will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not desired to limit the invention to the exact construction shown and described, but all suitable modifications and equivalents may be restored to, falling within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A rotary disk Sharpener comprising a support, an abrasive wheel rotatably carried by said support, mounting means for attaching said support to a rotary disk frame, resilient means engaging said support and urging said wheel against the rim of a disk, brace means engaging said support and adapted for engagement with a rotary 5 disk frame for angularly adjusting the axis of rotation of said Wheel relative to that of said disk, said brace means comprising an anchor clamp adapted to engage a rotary disk frame, an adjustable link secured to said anchor clamp and said support.

2. A rotary disk Sharpener comprising a support, an abrasive Wheel rotatably carried by said support, mounting means for attaching said support to a rotary disk frame, resilient means engaging said support and urging said wheel against the rim of a disk, brace means engaging said support and adapted for engagement with a rotary disk frame for angularly adjusting the axis of rotation of said Wheel relative to that of said disk, said brace means comprisingI an anchor clamp adapted to engage a rotary disk frame,an adjustable link secured to said anchor clamp and said support, said mounting means comprising a standard, a clamp securing said standard to a rotary disk frame, a carriage slidable upon said standard for longitudinal adjustment thereon, an arm pivoted to said carriage, said support being secured to said arm.

3. A rotary disk Sharpener comprising a support, an abrasive wheel rotatably carried by said support, mounting means for attaching said support to a rotary disk frame, resilient means engaging said support, and urging said Wheel against the rim of a disk, brace means engaging said support and adapted for engagement with a rotary disk frame for angularly adjusting the axis of rotation of said wheel relative to that of said disk, said brace means comprising an anchor clamp adapted to engage a rotary disk frame, an adjustable link secured to said anchor clamp and said support, the axes of rotation of said disk and wheel being inclined whereby relative rotation thereof will cause sliding of said wheel upon said disk.

WILLIAM A. FRUSHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 681,440 Clizbe Aug. 27, 1901 747,476 Quigley et a1 Dec. 22, 1903 1,012,772 Walker Dec. 26, 1911 1,044,137 Cassady 1 Nov. 12, 1912 1,316,520 Summers Sept. 16, 1919 1,506,497 Meyer Aug. 26, 1924 1,907,585 Roetering May 9, 1933 2,126,632 Harth Aug. 9, 1938 

